William Marshall Mauney Jr.

CIK: 0002025220

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)11 (57.9%)

Position reduction

Option Exercises (M)0 (0.0%)

Derivative conversions

Awards (A)4 (21.1%)

Compensation grants

Other (G, F, J, C, D, …)4 (21.1%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

POWL

POWELL INDUSTRIES INC

Officer

Discretionary Trading P&L

Holdings

Transaction History (19 total)

POWL
POWELL INDUSTRIES INC
Oct 1, 2026
Award(A)
Direct
525 shares at avg. $181.67$95K
POWL
POWELL INDUSTRIES INC
Sep 30, 2026
Sale(S)
Direct
301 shares at avg. $187.67$56K
POWL
POWELL INDUSTRIES INC
May 11, 2026
Sale(S)
Direct
386 shares at avg. $322.70$125K
POWL
POWELL INDUSTRIES INC
May 11, 2026
Sale(S)
Direct
176 shares at avg. $323.82$57K
POWL
POWELL INDUSTRIES INC
May 11, 2026
Sale(S)
Direct
313 shares at avg. $324.87$102K
POWL
POWELL INDUSTRIES INC
May 11, 2026
Sale(S)
Direct
623 shares at avg. $325.97$203K
POWL
POWELL INDUSTRIES INC
May 11, 2026
Sale(S)
Direct
9 shares at avg. $327.69$3K
POWL
POWELL INDUSTRIES INC
May 11, 2026
Sale(S)
Direct
66 shares at avg. $327.06$22K
POWL
POWELL INDUSTRIES INC
May 11, 2026
Sale(S)
Direct
927 shares at avg. $321.86$298K
POWL
POWELL INDUSTRIES INC
Dec 19, 2025
Sale(S)
Direct
3K shares at avg. $331.73$995K
POWL
POWELL INDUSTRIES INC
Dec 1, 2025
Award(A)
Direct
3K shares at avg. $315.03$945K
POWL
POWELL INDUSTRIES INC
Oct 1, 2025
Award(A)
Direct
300 shares at avg. $287.18$86K
POWL
POWELL INDUSTRIES INC
Sep 30, 2025
Tax Payment(F)
Direct
466 shares at avg. $301.28$140K
POWL
POWELL INDUSTRIES INC
Sep 5, 2025
Tax Payment(F)
Direct
770 shares at avg. $266.80$205K
POWL
POWELL INDUSTRIES INC
Dec 4, 2024
Sale(S)
Direct
300 shares at avg. $287.08$86K
POWL
POWELL INDUSTRIES INC
Dec 4, 2024
Sale(S)
Direct
700 shares at avg. $282.91$198K
POWL
POWELL INDUSTRIES INC
Oct 1, 2024
Award(A)
Direct
400 shares at avg. $182.14$73K
POWL
POWELL INDUSTRIES INC
Sep 30, 2024
Tax Payment(F)
Direct
433 shares at avg. $221.11$96K
POWL
POWELL INDUSTRIES INC
Sep 6, 2024
Tax Payment(F)
Direct
770 shares-

		Type	Shares	Price		Ownership
Oct 1, 2026	POWL POWELL INDUSTRIES INC	Award(A)	525	$181.67	$95,377	Direct
Sep 30, 2026	POWL POWELL INDUSTRIES INC	Sale(S)	301	$187.67	$56,489	Direct
May 11, 2026	POWL POWELL INDUSTRIES INC	Sale(S)	386	$322.70	$124,562	Direct
May 11, 2026	POWL POWELL INDUSTRIES INC	Sale(S)	176	$323.82	$56,992	Direct
May 11, 2026	POWL POWELL INDUSTRIES INC	Sale(S)	313	$324.87	$101,684	Direct
May 11, 2026	POWL POWELL INDUSTRIES INC	Sale(S)	623	$325.97	$203,079	Direct
May 11, 2026	POWL POWELL INDUSTRIES INC	Sale(S)	9	$327.69	$2,949	Direct
May 11, 2026	POWL POWELL INDUSTRIES INC	Sale(S)	66	$327.06	$21,586	Direct
May 11, 2026	POWL POWELL INDUSTRIES INC	Sale(S)	927	$321.86	$298,364	Direct
Dec 19, 2025	POWL POWELL INDUSTRIES INC	Sale(S)	3,000	$331.73	$995,190	Direct
Dec 1, 2025	POWL POWELL INDUSTRIES INC	Award(A)	3,000	$315.03	$945,090	Direct
Oct 1, 2025	POWL POWELL INDUSTRIES INC	Award(A)	300	$287.18	$86,154	Direct
Sep 30, 2025	POWL POWELL INDUSTRIES INC	Tax Payment(F)	466	$301.28	$140,396	Direct
Sep 5, 2025	POWL POWELL INDUSTRIES INC	Tax Payment(F)	770	$266.80	$205,436	Direct
Dec 4, 2024	POWL POWELL INDUSTRIES INC	Sale(S)	300	$287.08	$86,124	Direct
Dec 4, 2024	POWL POWELL INDUSTRIES INC	Sale(S)	700	$282.91	$198,037	Direct
Oct 1, 2024	POWL POWELL INDUSTRIES INC	Award(A)	400	$182.14	$72,856	Direct
Sep 30, 2024	POWL POWELL INDUSTRIES INC	Tax Payment(F)	433	$221.11	$95,741	Direct
Sep 6, 2024	POWL POWELL INDUSTRIES INC	Tax Payment(F)	770	-	$0	Direct

1-19 of 19 transactions

About Mauney William Marshall Jr

Mauney William Marshall Jr (SEC CIK 0002025220) files insider reports with the SEC as Vice President, R&D of POWELL INDUSTRIES INC (POWL).

Signal8 holds 9 ownership filings by Mauney William Marshall Jr, all Form 4s, filed between Sep 10, 2024 and Oct 2, 2026. Those filings report 19 transactions, from Sep 6, 2024 to Oct 1, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Mauney William Marshall Jr's filings is in HOUSTON, TX.

Recent filings by Mauney William Marshall Jr

Oct 1, 2026: Grant or award of POWL shares (Form 4, code A).
Sep 30, 2026: Open-market sale of POWL shares (Form 4, code S).
May 11, 2026: Open-market sales of POWL shares (7 lines, Form 4, code S).
Dec 19, 2025: Open-market sale of POWL shares (Form 4, code S).
Dec 1, 2025: Grant or award of POWL shares (Form 4, code A).

Other insiders filing for POWELL INDUSTRIES INC (POWL)

Ni Ping, Corp Controller
HOGLUND PETER G, Vice Pres, Global Service
TUNINETTI DAVIDE, CHIEF HUMAN RESOURCE OFFICER
Birchall John, Managing Director
Eckenrode David L, Assistant Secretary/Treasurer
McKertcher Terry B, Vice President, Operations

How to read Form 4 transaction codes